While I wouldn’t be opposed to buffing physical damage builds in pvm, there is just a cascading effect as pvp and pvm inherently follow a different set of rules and trying to balance both simultaneously is going to be a challenging task. We saw with D4 blizzard came out from the very beginning and admitted they wouldn’t put any effort into trying to balance the pvp aspect of the game for this reason.
It would be super easy to just apply different unit dmg modifiers to each skill that needs to be balanced.
The code is already there in the files…
Say you want to buff tornado for pvm, but not pvp.
You add 1.33x to the base dmg
But also change the player unit modifier from 0.17 to 0.17*0.75=0.128
And voila! You now have 1.33x more tornado dmg only for pvm, pvp is unchanged.